Tire and wheel jack



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D. F. MINER TIRE AND WHEEL JACK Nov. 27, 1951 Filed Aug. 26, 1949 D. F.MINER TIRE AND WHEEL JACK Nov. 27, 1951 Filed Aug.' v26, 1*- 949 2SHEETS- SHEET 2 HVVENTOR.

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BY )flwmymmvmafz Patented Nov. 27, 1951 UNITED STATES PATENT OFFICE IlClaims.

This invention relates to a tire and Wheellifting mechanism o1' jack,and more particularly to a wheel jack having a vertically andhorizontally-adjustable wheel-supporting carriage.

It is an object of this invention to provide a jack of the kind to bemore particularly described hereinafter for use in lifting and applyingor removing heavy single and dual Wheels from trucks and buses, as ingarages, on farms, road contract work, and the like. The jack of thisinvention is especially applicable for use by long-distance truckers toprovide for the changing of tires by one man on the open road.

Another object of this invention is to provide a tire and wheel-liftingdevice of this kind which may be readily handled by one man for lifting,swinging and rotating a wheel to be secured on the wheel hub of avehicle.

Still another object of this invention is to provide a tire and wheeljack which may be readily manufactured by conventional manufacturingmeans and methods at an economical cost to provide for its widedistribution and use.

A further object of this invention is to provide a wheel jack having avertically-movable platform and a horizontally-shiftable carriageslidable along the length of the platform for shifting a wheel to theproper position for attachment to the hub of a vehicle, the wheel beingrotatable on the carriage for properly aligning l the hub studs with theopenings of the wheel.

With the above and other objects in view, my invention consists in thearrangement, combination and details of construction disclosed in thedrawings and specification, and then more particularly pointed out inthe appended claims.

In the drawings:

Figure 1 is a top plan view of a jack or lifting device constructedaccording toan embodiment of my invention;

Figure 2 is a side elevation thereof;

Figure 3 is a transverse section taken on the line 3-3 of Figure 2;

Figure 4 is a fragmentary longitudinal section taken on the line 4 4 ofFigure 1;

Figure 5 is a fragmentary detail transverse section taken on the line 55 of Figure 1.

Referring to the drawings, the numeral IU designates generally a wheeljack or lifting device especially applicable for lifting the single ordual wheels of trucks, buses and similar vehicles, for securing`thetires and wheels on the axles or wheel hubs of the vehicle. As thewheels of this type are of considerable Weight, and as it is necessarythat the wheels be supported and positioned in a certain manner prior totheir installation on the hub, the jack I0 is formed for lifting,sliding and rotating the wheel to its proper position for slidingengagement on the wheel studs of the vehicle.

rlhe lifting device Hl comprises a horizontal base il whch issubstantially U-shaped in coniiguration, having a pair of longitudinallyextending angleY iron side arms I2 and I4. The side arms I E and I areunconnected at their forward ends and are secured together at theirrearward ends by a transverse connecting bar I 5 and a sprocket andchain housing I6 which is fixed on the transverse bar or bight member I5and extends upwardly therefrom, as clearly shown in Figure 2 of thedrawings.

An open rectangular upper frame I 'l is supported upon and above thebase frame I I by a plurality of scissor jack members I8 which areconnected at their lower ends to the side arms of the base frame and attheir upper ends to the side members of the upper frame I'I. The upperframe I l comprises a pair of longitudinally extending side members I9connected together at their opposite ends by a pair of transverse framemembers 2B and 2l. The longitudinallyextending side frame members I8 andI9 are formed of angle iron having a horizontal flange 2li and adepending flange 25 formed integrally with the inner longitudinal edgeof the horizontal flange 24. f The upper frame is disposed within thesides and ends of the base frame II so that the upper frame Il can nestwithin the base frame I in the fully retracted positions of the scissorjacks I.

Each of the scissor jack members I3 is formed of a pair oftransversely-spaced-apart, upwardly and rearwardly-inclined lower links26- which are pivoted at their lower ends on a bearing member 2 fixed onone of the longitudinallyextending base side members. A pair offorwardly and upwardly-directed lower links 28 are also pivoted on thebearing member 21, the pairs of links 2S and 28 being disposed inoverlying relation at one end of vthe pivot member 21, the pairs oflinks 25 and 2B being extensible in opposite directions upon operationof the jack I3. The upper ends of the rearwardly-extending links 25 arepivotally connected on the opposite sides of a nut member 29 and theforward, upper ends of the forwardly-extending links 28 are pivotallyconnected on. a nut member 3i).- A pair of downwardly' andrearwardly-swingable links 3l are pivoted between the nut member 29 andone, of theside frame members of the upper frame I1, the lower ends ofeach of the links 3| being pivotally connected to the nut member 29 andthe upper ends of the links 3| being pivotally connected on a bearing orpivot member 32 which is .fixed on the lower side of a side member ofthe upper frame, as shown in Figure of the drawings. One of the pairs oflinks is pivotally supported on one end of the transverse pivot member32, and the other links are pivotally supported on the other end of thesame pivot member, and a pair of forwardly-extendable links 34 overliethese links on the outer side thereof, and the spacedapart outer links34 are pivotally connected on the outer side of the nut member 3B. Alongitudinally-extending screw member 35 is thread-Y ably engaged.through each of the nut elements 29 and 3d, the screw member 35 beingdisposed in a horizontal plane parallel to the base frame I I and theupper frame I1. The forward section 36 of each of the screw member 35 isthreaded in one'direction,v while the rearward section 31 of the' samescrew element is threaded in the opposite direction, so that uponrotation of the screw member 35, the nut members 29 and 30 will becaused to move togetherV or apart, depending upon the direction ofrotation of the screw; The screw sections on each side of the base frameII are connected together by connecting bars 3S, the forward end of therearward section being xedly connected to the rearward endof the forwardsection so that rotation of one of the screw sections will directlyproduce simultaneous rotation of the other screw section.

For actuating all of the /jack members I3 simultaneously, a crank member39 is rotatably supported on the housing I6, intermediate the lengththereof, and a master gear or sprocket 4l) is fixed on theinwardly-extending arm 4I of Vthe crank 39. A small sprocket 42 isrotatably supported in one end of the housing I5 in alignment' with oneof the longitudinal base frame members, asy the base frame member I2,and a similar reduced sprocket 44 is rotatably supported in the otherend of the housing I6, substantiallyV in longitudinal alignment with theother ofthe longitudinally-extending base frame members I4. A chain 45is trained about the upper'edgevof'the master sprocket 4I! and about theouter vsurfaces of the outwardly-disposed small sprockets 42, as clearlyshown in Figure 3 of the drawings, so that rotation of the crank 39 willrotate the driven sprockets 42 and 44 simultaneously. Both the sprockets42 and 44 are connected to the adjacent screws 35 by suitable shafts 46which are connected to the sprocket shafts by universal joints 41 and tothe rearmost end ofthe adjacent screws 35 by similar universal joints4B. The connecting shaft between the universal joints 41 and 48 issplined or otherwise formed for providing the rotation of the universaljoints 41 and 4B, while also providing for longitudinal extension andconstruction of the universal joints as required by the variousadjustments of the jacks I3 relative to the sprockets and housing I6.

A longitudinally-extending rail 43 is xedly supportedY on the inwardside of the vertical flange 25 of each of the side frame members I8 andI9 of the upper frame I1, the rail 49 including a laterallyinwardly-extending horizontal iiange 5G. The rails Y49 extend along theentire length ofthe side frame members I8 and Igfandaplatfcrm 43 isrollably supported on the anges 59 of the rails 49 to provide for thelongitudinal:v sliding movementl of the platformV 43 on the frame I1.The platform 43 is formed with a pair of longitudinally-extending sideframe members 52 and transverse end members 5I xedly secured between thefront and rear ends of the respective side frame members 52. A pluralityof vertically-spaced-apart rollers 54 and 55 are rotatably supported onthe opposite ends of each of the side frame members 52, as clearly shownin Figure 5 of the drawings. The uppermost roller 54 being engaged onthe. upper surface of the flange 59, and the lower roller 54 beingrotatably engaged with the lower surface of the flange 50, theengagement of the lower roller providing for the secure engagement ofthe platform 43 on the upper frame I1 when a weight is being lifted bythe jack I0. A similar pair of rollersl 54 and 55 are carried by eachend of each of the platform side members 52.

A carriage 56 is swingably supported above the platform 43 for swinginglongitudinally .and laterally or transversely of the platform 43 and thebase I'I. The carriage 56 is formed with a pairy oftransversely-spacedapart, longitudinally-extending side frame members 51connected together at their opposite ends by transverse frame membersV5S and a fiat plate 59 is iixed on the upper sidev of the frame thusdefined by the longitudinally and transversely-extending frame members51 and 58. A crankarm 50 is pivotally connected between each cornerofthe car.- riage 56, and the platform 43 therebelow. Each of the crankarms 3B is formed with a pivot pin iI which is rotatably* engageable inoneend. of the transverse supporting member 62 carried by the platform43. A similar but oppositelyextending crank pin 64 is rotatably engagedthrough an end of the transverse supporting member 55 carried by thecarriage 5B. A pair of transverse braces or supporting members 65 arefixed on the lower side of the carriage 56 at the forward and rear endsthereof. A connecting link or arm 56 is. fixed tothe confronting ends ofthe crank pins` 6I and 64 of each of the kingpins Sli'in the mannerclearly shown in Fig,- ure 4' of the drawings.. The engagement of theplurality of kingpins 5S. between the platform 43 and carriage 56provides for the swinging of the carriage 53 longitudinally andtransversely of the platform and supporting base II.

A forwardly-extending side arm 61 is fixed' on the opposite sides of thecarriage 56 and. extends longitudinally thereof. Each of the side arms61 extends forwardly beyond'the forward edge of the carriage 56, and aroller 68 is rotatably supported on the extreme outwardly-extending endof each of the side arms 61. The roller 63 rotatably engaged about theouter end of* each. of the side arms is disposed in a horizontal planeparallel to the plane of the platform 43Y and carriage 5.6, those planesbeing also parallel to the plane of the base member I I. The rollers 63,being on Ythe forward ends of the side arms 61, are transverse.- lyspaced apart and are rotatable on a longitudinal axis, as dened by theforward extension of th-e side arms. As shown in Figure 2 of thedrawings, the rollers 58 are depressed or downwardly offset from themajor longitudinal axis of the side armsA 61, being secured to theforward ends of the side arms Vby a downwardly and forwardlyinclinedconnecting member 69 which is fixed to or preferably formed integrallywith the side arm. The downward depression of the rollers 68pmvides forthe more compact arrangement-of the folded orfretracted jack I0, andalso providesfor the moresuitable engagement ofthe rollers'r 68 under awheel W to |be secured on the vehicle.

An L-shaped bracket lll is xed on the upper surface of the carrier 55 atthe rear end thereof and is formed with a plurality of longitudinallyspaced-apart apertures ll therethrough. .an arm 12 is adapted to beremovably engaged in a selected one of the apertures 'H for properlysecuring and positioning the wheel W as it is being moved about forattachment to the vehicle.

An arcuate plate or segmental sleeve 14 is fixed on the extreme forwardor outer end of the rod 'I2 and is formed for an engagement over theupper side of the whe-el W on the rollers 68. The connection between thesleeve 'lll and the carriage 56 by way of the link or rod l2 providesfor the secure supporting of the wheel W on the carriage, as thecarriage is being moved about for properly positioning the wheel W to beattached to the truck or other vehicle.

In the use and operation of the lifting device l0, the wheel W to beinstalled on the vehicle is initially placed on the rollers 63 with theplatform and carriage in their lowered or retracted position. Thesegmental sleeve or plate M is then engaged over the upper end of thewheel W for supporting the wheel W erect during the movement of theplatform L33 and carriage Rotation of the crank 39 will provide for theextension of the jack I3 for lifting the guide frame or rail frame Ilvertically upwardly for properly positioning the wheel W in its selectedvertical alignment with the hub on which it is to be sup` ported. Theplatform 113 is then rolled or slid forwardly on the tracks or guidemembers 49 for positioning the wheel W very close to the hub, and thecarriage 56 may be swung about the kingpins 69 to provide for the closeadjustment or movement of the wheel W to be engaged on the hub. When thevertical and transverse disposition of the wheel W has been determined,the wheel and platform are then moved forwardly on the rails 49 untilthe studs of the hub are engaged in the openings of the wheel forsecuringT the wheel thereon. When the wheel W is engaged on the hub andthe studs thereof, the rod 12 may be disengaged from the bracket 'Hi andthe sleeve or plate 1B removed from the upper side of the wheel W andthe wheel may then be fixedly secured on its proper hub.

I do not mean to confine myself to the exact details of constructionherein disclosed, but claim all variations falling within the purview ofthe appended claims.

I claim:

1. In a lifting device, a base frame having longitudinal side members,an upper frame overlying said base frame and having side members,vertically extensible and contractible jack means positioned between theside members of the base and upper frames for raising and lowering saidupper frame relative to said base frame, a carriage rollably mounted onand positioned between the side members of said upper frame, a platformoverlying said carriage, vertical axis crank means mounting saidplatform on said carriage and enabling said platform to be laterally andlongitudinally displaced relative to said carriage, and work engagingrmeans on said` platform.

2.In a lifting device, a base frame having longitudinal side members, anupper frame overlying said base frame and having side members,vertically extensible and contractible jack means positioned between theside members of the base and upper frames for raising and lowering saidupper frame relative to said base frame, a carriage rollably mounted onand positioned between the side members of said upper frame, a platformoverlying said carriage, vertical axis crank means mounting saidplatform on said carriage and enabling said platform to be laterally ands' longitudinally displaced relative to said carriage,

and work engaging means on said platform, said work engaging meanscomprising horizontal arms projecting beyond said platform.

3. In a lifting device, a base frame having longitudinal side members,an upper frame overlying said base frame and having side members,vertically extensible and contractible jack means positioned between theside members of the base and upper frames for raising and lowering saidupper frame relative to said base frame, a carriage rollably mounted onand positioned between the side members of said upper frame, a platformoverlying said carriage, vertical axis crank means mounting saidplatform on said carriage and enabling said platform to be laterally andlongitudinally displaced relative to said carriage, and work engagingmeans on said platform, said work engaging means comprising horizontalarms projecting longitudinally beyond an end of said platform.

4. In a lifting device, a base frame having longitudinal side members,an upper frame overlying said base frame, and having side members,vertically extensible and contractible jack means positioned between theside members of the base and upper frames for raising and lowering saidupper frame relative to said base frame, a carriage rollably mounted onand positioned between the side members of said upper frame, a platformoverlying said carriage, vertical axis crank means mounting saidplatform on said carriage and enabling said platform to be laterally andlongitudinally displaced relative to said carriage, and work engagingmeans on said platform, said jack means comprising scissor jacks havinglongitudinally extending operating screws, and operating means on oneend of said base frame connected to both of the operating screws foroperating the jacks together.

DAVID F. IWINR.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 80.8,212 Podmore Dec. 26, 19051,535,762 Brejska Apr. 28, 1925 1,741,624 Hansen Dec. 31, 1929

